CVE-2026-4636
Keycloak: UMA Policy Resource Injection Allows Unauthorized Cross-User Permission Grants
8.1
HIGH
CVSS 3.1
EPSS 0.35%
描述
A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.
如何修補 CVE-2026-4636
要修補 CVE-2026-4636,請將受影響套件升級到下列已修補版本。
- —升級至 26.5.7 或更新版本
CVE-2026-4636 正在被利用嗎?
低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 26.5.7
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |